Space boffins have suggested the supermassive black hole at the centre of our galaxy may have a powerful appetite for hot gas.
The European Space Agency's Herschel telescope has captured far-infrared images which appear to show the black hole sucking in a huge cloud of gas.
One astronomer said it looked as if the hole was " …

or maybe just a 'metaphor'

«Black hole burping out x-rays» ?

No, no ; black holes are far too well-bred to do anything like that. A little Hawking radiation perhaps - and even that's never been conclusively observed - but certainly nothing so gross as x-rays !...